The P2602 code indicates a problem with the Coolant Pump “A” control circuit. This fault code is part of the On-Board Diagnostics II (OBD-II) system, which helps monitor the performance of the vehicle’s components and systems.
What Does the P2602 Code Mean?
The P2602 code is triggered when the Powertrain Control Module (PCM) detects a low voltage in the coolant pump control circuit. This typically indicates that the coolant heat storage (CHS) system is not functioning as intended, which can affect the engine’s efficiency and performance.
What Causes the P2602 Code?
Several factors can lead to the P2602 code, including:
- Coolant Heat Storage (CHS) water pump failure
- Coolant Heat Storage (CHS) water pump relay malfunction
- Powertrain Control Module (PCM) failure
- Wiring issues within the control circuit
What Are the Symptoms of the P2602 Code?
Common symptoms of the P2602 code may include:
- Engine overheating
- Check Engine Light (CEL) illuminated
- Poor fuel economy
- Engine performance issues when starting
How Serious Is the P2602 Code?
The P2602 code is considered urgent and indicates that immediate action is necessary. If not addressed, it can lead to severe damage to the vehicle’s engine or pose safety risks to the driver and passengers.
How to Diagnose the P2602 Code
To diagnose the P2602 code, follow these steps:
- Use an OBD-II scanner to confirm the P2602 code and check for any other related trouble codes.
- Inspect the wiring and connectors related to the coolant pump circuit for damage or corrosion.
- Test the coolant pump and relay for proper operation.
- Check the Powertrain Control Module (PCM) for faults if the pump and relay are functioning correctly.
Common Repairs for the P2602 Code
Repairs for the P2602 code may include:
- Replacing the coolant heat storage water pump
- Replacing the coolant heat storage pump relay
- Repairing or replacing damaged wiring or connectors
- Replacing the Powertrain Control Module (PCM) if necessary
How Much Does It Cost to Fix the P2602 Code?
The cost to fix the P2602 code can vary significantly depending on the underlying issue. On average, repairs can range from $100 to $800, depending on whether components need to be replaced or if wiring issues are present.
Can I Fix the P2602 Code Myself?
While some experienced mechanics may handle the diagnosis and repair of the P2602 code themselves, it is generally recommended to consult with a professional. Proper diagnosis is crucial, as simply replacing parts may not resolve the underlying issues. If you’re not comfortable with automotive repairs, seeking professional help is advisable to ensure that the problem is accurately diagnosed and repaired.
